package com.ruoyi.common.utils;

import java.util.Date;
import java.util.Random;

public class RandomUtil {

    public static String getRandom(int length){
        String val = "";

        Random random = new Random();



        //参数length，表示生成几位随机数

        for(int i = 0; i < length; i++) {



            String charOrNum = random.nextInt(2) % 2 == 0 ? "char" : "num";

            //输出字母还是数字

            if( "char".equalsIgnoreCase(charOrNum) ) {

                //输出是大写字母还是小写字母

                int temp = random.nextInt(2)%2 == 0 ? 65 : 97;

                val += (char)(random.nextInt(26) + temp);

            } else if( "num".equalsIgnoreCase(charOrNum) ) {

                val += String.valueOf(random.nextInt(10));

            }

        }

        return val;
    }
}
